Magic Chef Extended Cooling Fan Operation

Microwave continues to run the fan for a long time after cooking has finished.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

High internal temperature, Stuck cooling fan relay, Faulty temperature sensor, Control board logic issue

How to Fix / Troubleshooting

Note: Some Magic Chef models are designed to run the cooling fan for several minutes after cooking; this can be normal.

Checks:

  • Observe how long the fan runs after a typical cook cycle; compare with the user manual if available.
  • Ensure vents are not blocked and filters are clean to allow proper cooling.

If fan runs excessively (e.g., 20+ minutes) or never shuts off:

  • Unplug the microwave and inspect the control board fan relay for signs of sticking or heat damage.
  • Check the magnetron thermostat or temperature sensor for proper operation.

Corrective actions:

  • Replace a stuck fan relay by replacing the main control board.
  • Replace a faulty thermostat or temperature sensor.
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Repair Difficulty

Medium 3/5

Required Part

Main Control Board
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